[Tutor] List's name in a string

["Héctor Villafuerte D."]

Jeff Shannon wrote:

> Héctor Villafuerte D. wrote:
>
>> You're right, I need to briefly explain what I want to do:
>> * There's a list (LIST) which contains filenames (as strings); i.e.: 
>> LIST = ['file1', 'file2'].
>> * There's some processing on each file refered to by LIST.
>> * The processed output should be stored in a file named 'LIST_proc' 
>> (producing just one
>> output file, appending the results from 'file1', 'file2', etc.)
>
>
> Okay, that seems pretty straightforward.  I'd do this following a 
> rough skeleton something like this:
>
> outfile = file('LIST_proc', 'w')
> for filename in LIST:
>     infile = file(filename,'r')
>     process_file(infile, outfile)
>     infile.close()
> outfile.close()
>
> where process_file() reads lines from the input file, massages them in 
> whatever way necessary, and writes the result to outfile.
>
> To be honest, I'm not sure where the desire to get a variable by name 
> came in; perhaps you were thinking that using names from the list was 
> a little more complex than it really is?
>

Ok, you're right.... I should have said that I have multiple LISTs and 
that I want to do something like this:
 >>> file_w = open(LIST.name() + '_proc', 'w')
at least that's the basic idea.

I could write one open statement for every list in my program (there 
aren't that many), but I'm trying to make a function
in order to generalize this my code. This function looks like this:
NOTES:
* traf is the expected list with filenames to process

def build_basic(traf):
    """Creates basic processed files."""
    if traf:
        file_w = open(traf.name()  + '_proc', 'w')       # THE PROBLEM 
IS HERE (this is pseudocode)
        for arch in traf:
            for line in fileinput.input(arch):
                file_w.write( line[0:8] + line[8:16] + line[16:22] + 
line[22:36]
                              + line[50:56] + line[62:69] + line[69:76] 
+ '\n')

Thanks again.